pytorch

e1bdebf6 - Adding DataLoader2 class as future replacement of DataLoader (#63742)

Adding DataLoader2 class as future replacement of DataLoader (#63742) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/63742 Supports sharding and batching on loader level** Supports sharding and batching on loader level Test Plan: Imported from OSS Reviewed By: ejguan Differential Revision: D30494506 Pulled By: VitalyFedyunin fbshipit-source-id: 6648e09d955055ac38e3a4e3973f701acefca762